Baffle system for stirling boilers.



D. S. JAOOBUS. RAFFLE SYSTEM FOR STIRLING BOILER-S.

APPLIGATION FILED AUG. 12. 1913.

1,132,015. Pat nted Mar.16,1915.

WITNESSES: U l/VVE/VTOR J ATTORNEY .r.

13' understood by reference to the accompany- TE STATES, PAT

snares.

DAVID s. JAeo Bns, or JEitsEY orrY, NEW JERSEY, AssIenoR so THE BAECOCF. a wILeox COMPANY, or BAYONNE, nEw JERSEY, A oonroaarron or new JERSEY.

To all whom it may concern:

Be it known that I, DAVID S. Jaooeus, a citizen of the United States, residing at Jersey City, in the countyof Hudson and State. of New Jersey, have invented new and useful Improvements in Baflle Systems for Stirling Boilers, of which the following is a specification.

My jnventlon relates to a system of special bafiles for Stirling boilers, and will be ing draw1ng,showing a side elevation,partly in section, of one embodiment thereof. In the design shown, then'umeral 1 desighates the front ,Wall and 2, the rear wall of the boiler setting; 3 the furnace having. a Roney stoker, although the furnace may be equipped with a chain-grate or other suitable form of stoker'; and 4:, 5 and Strapsversesteam and water drums, set parallel, and connected to a mud drum 7, by banks of water. tubes 8, 9, and 10 respectively, the

tubes being so curved as to enter the tube sheets radially. The steam space of the center dru is interconnected to boththe front and near drums by rows of ,curved steam circulatihg tubes 11, and to the water space Qfthe front drum by rows of water circulating tubes 12, and to the water space of the rear drum by rowsof water circulating tubes 13, Coverings of fire brick 12 and 13, resting upon the upper row of tubes 12 and the row of tubes 13,-respectively, prevent the gases passing above these tubes. A feed pipe enters the rear steam andwater drum 6, and the main steam outlet 5' is placed on'topof the center drum. A superheater 14, of standard design, may be placed in the space between the front and'middle banks of tubes, the steam'main being connected to one of the superheater boxes.

In the standard Stirling boiler a battle rests against the rear tubes of the front bank, reaching from the mud drum nearly to the top of the bank, and a second baffle rests against the rear tubes of the middle bank, reaching from the center steam and water drum nearly to the bottom of the bank. -helves are placed near the top of the front ballie and near the top of the rear bank of tubes. The bafiles guide the gases up the front bank of tubes, down the middle bank, and up the rear bank to the outlet fine, the shelf near the top of the rear bank preventing by-passing of the RAFFLE SYSTEM FOR STIRLING BOILERS.

Specification of Letters Patent. Patented Riga. i 6, 35915,, Application as August '12, 1913. Serial No. 784,314.

wall is a vertical wall 17extending upward to the first row of tubes of the front bank, and from one side wall of the setting to the other side wall. From the top of wall 17 a bafile 18 extends toward the top of the .front bank of tubes, causing the gases to enter the front bank at the upper part thereof and to then flow downward over the 1 tubes of the front bank at therear of Joafile 18 and wall 17. The tubes of the middle bank support two baffles, one of which, 19, is supported between the first and second rows and extends from the center steam and water drum downward to nearly the bottom of the bank, and the other,20, is supported on the rear row of tubes and extends from the mud drum 7 upwardly to nearly the top of the bank. To cause the gases to flow ownward river the tubes of the rear bank,

Iintro'duce a baiile 21, extending from the.

reztr steam and water drum 6 downward to" nearly the bottom of the bank. The baffle 21 is at the rear of the bank 10 so as to expose, if desired, one or two rows of tubes in the last pass. The rear wall 2 of the setting is set far enough away from the lower part of the rear bank of tubes to allow a proper opening for the flow of the gases. As indicated by the arrows, the gases from the furnace are first directed to the top of the front bank of tubes, thence into the superheater space and downward under the tubes of the front bank at the rear of wall 17 and baffle 18, then upward over ove the tubes of the rear bank, and finally upward through the idle pass back of the rear bank to the flue outlet 22.

With a baille of the standard Stirling type, the hot gases pass over all of the sur 'face of the tubes of the front bank before at the rear of the front bank will be higher than with the standard beffle. With such vthe tubes of the middle bank, downward special baffle' the flame or hot gas 'will'be projected into the space atthe rear and near water drum, this flame orhot gas will play the't'op ofthe first pass; and, if there is any leakage through the baflle 19, which projects downwardly from the center steam and against the rearsteam and water drum. The purpose, therefore, of using the additional water circulating tubes 13 is to avoid the possibility of overheating the rearsteam and Water drum when the boiler is run at a high overload with special bafiles of the kind described. The Water level in the rear drum lating tubes 13, Water will continuously flow of a Stirling boiler when. run at high over loads is lower than in the other steam and water drums and by providing the circuthrough said tubes from the middle steam and water drum a will cool the shell of the rear drum. VlthOlll? such circulators, .the shell may become overheated if j the flames or hot gases impinge upon it.

- in the rear bank extending downwardly In my application Serial No. 784,313 filedof even date herewith I have shown and de. scribed a Stirling boiler in which instead of a'vertical wall at the rear of the combustion chamber and a battle extending from said wall, a haflle extendsupward from the mud drum at the front of the first bank of tubes and constitutes the back of the combustion chamber. The vertical wall 17 provides for a dust collecting'chamber as described more fully in my application Serial No. 777,503,

filed July 5, 1913.

What I claim is: e v

1. A boiler of the class described comprising transverse steam and water drums and a mud drum, banks of tubes expanded into said drums, a wall at the rear of the furnace chamber reaching upwardly to the front bank of tubes, a baifle extending from said wall to cause the gases to enter the front.

bank of tubes at the upper portion thereof and then to flow downwardly over said bank at therearof the bafiie and wall, baflles in the middle bank one of which extends'downwardly from, the middle steam and water drum and the other upwardly from the mud drum to cause the gases to flow upwardly over the tubes of the middle bank, a baffle from the rear steam and water drum to cause the gases to flow downwardlyover the tubes oftheisear bank and then upwardly to. the flue outr'et'pack of, the rear bank of tubes,

and water air relating tubes between themiddleand rear steam and Water drums.

2. A boiler otthe clas's describedcom prising transverse steam and water drums and a mud drum, banks of tubes expanded into said drums, a furnace, a secondary combustion chamber between the. first and second banks oftubes, a wall at the rearnf the furnace chamber extending u Ward to the first bank to cause the gases to rst enter said bank at the upper part thereof and to cross into saidsecondary combustion chamber, baffles to define the path followedfby the gases passing from one bank to the next and to cause the gases to enter the last bank at the upper part thereof and to flow downward among the tubes of said bank to the of said bank, and water circulating tubes betWeen the middle; andrear steaniend 'wa'ter drums.

3. A boiler of'the lower, part thereof and upward at the rear class described com- I prising transverse steam and water drums and a mud drum, banks of tubes expanded into said drums, a furnace, a secondary combustion chamber between the first and second banks of tubes, a wall at the rear of the furna ce chamber extending upward to the first j bank to clause the gases to first enter said" 5 bank at the upper part thereof) and to crossinto said secondary combustion chamber, a

superheater located in said secondary combustion chamber, bellies to define. the followed by the gases passing from one ank to the nextand to cause the gases to enterath name in the presenceof two attesting witnesses, 1 I H DAVIDSLJAGOBUS.

- Witnesses; f a p -WM. Smummon,

" Gnnnnns S. Jones. 

